Case Study: Repairing a Leak in a Cracked Bathroom Sink PVC Drain Pipe

A cracked plastic PVC pipe in a domestic bathroom undergoes repair using Superfast Plastic Epoxy Putty

Stopping that sinking feeling – Superfast Plastic plugs a leak in a DIY bathroom plastic pipe repair

A homeowner used Superfast Plastic Epoxy Putty Stick to make a quick and easy DIY leak repair to cracks in a PVC plastic drain pipe located in a cupboard underneath their bathroom sink.

Case Study Data

Domestic bathroom
United Kingdom
Repair Type
Leak repair
Cracks in a PVC plastic sink drain pipe

Products Used

Superfast Plastic Epoxy Putty Stick
Specially formulated epoxy putty used to permanently seal holes and cracks in all types of plastic pipe

Case Study PDF

Case Study Details

The homeowner was alerted to the problem when they noticed that the bathroom floor next to the cupboard below the sink was wet. After inspecting inside the cupboard, it was discovered that several small cracks had developed in the PVC plastic drain pipe at the point where it connected with the sink.

The homeowner did not want to go to the expense of hiring a plumber to fix what they considered a minor problem. They instead purchased a Superfast Plastic Epoxy Putty Stick from Sylmasta to carry out a DIY repair of their own.

Several cracks had appeared in the pipe where it met the sink fitting

Superfast Plastic is a semi-flexible epoxy repair putty in an easy-to-use 114g stick format. It sets white and has been specifically formulated for the repair and bonding of all major plastic types, including PVC.

Before the repair began, the pipe was dried and cleaned. The required amount of putty was cut from the stick and kneaded by hand. Superfast Plastic starts out blue before the dye within the putty turns white to indicate successful mixing, after which it can be applied.

Superfast Plastic applied to leaking PVC bathroom sink drain pipe in a domestic repair
Superfast Plastic formed into a sausage shape and pushed into the cracks

Once the putty had become white, it was formed into a sausage shape and pushed against the cracks in the PVC pipe. After 25 minutes, it began to harden. Within 45 minutes, the putty had cured to provide a watertight seal, filling all cracks in the pipe.

Superfast Plastic achieves full properties in two hours, at which point the homeowner ran the tap on their sink. With no water escaping from the pipe into the bathroom cupboard as the sink drained, the leak repair had been a success.

Superfast Plastic Epoxy Putty used to repair a crack in a leaking PVC bathroom pipe
The completed repair with the pipe successfully sealed

Carrying out a DIY PVC pipe repair using Superfast Plastic cost less than £20, including shipping. The repair was permanent and the putty blended in unnoticed with the PVC plastic – just in case a future homeowner was a perfectionist and wanted a pipe in a darkened cupboard under the bathroom sink to look aesthetically pleasing.

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